NONEQUILIBRIUM IMPURE LATTICE SYSTEMS

We study d-dimensional lattice model systems whose dynamics consist of competing independent processes which may induce non-equilibrium steady states. Interesting phase transitions and critical phenomena ensue which are influenced, even dominated, by a sort of dynamical bond disorder. The latter, which may occur in natural systems, reminds us of the disorder in more familiar bond-diluted and other impure models, for example percolation-like phenomena arise in some of our model cases. Exact solutions for d = 1, some exact results for d > 1, and a comparison with more standard, either quenched or annealed, magnetically diluted models are reported.